Together Code Interpreter (TCI) is an API that allows developers to execute code generated by Large Language Models (LLMs) seamlessly with a simple API call. TCI solves the limitation of LLMs in executing code, enabling developers to build smarter apps with richer responses. By taking LLM-generated code as input, creating a session to execute it in a secure sandbox environment, and outputting the result, TCI simplifies agentic workflow development and opens new possibilities for reinforced learning operations. The API has been integrated into various applications, including reinforcement learning (RL), where it enables automated evaluation through rigorous unit testing, scaling to handle hundreds of concurrent sandbox executions, and providing secure environments that isolate execution, expose standard input/output interfaces, and integrate seamlessly into existing RL workflows. TCI is priced at $0.03/session, with a concept of "sessions" as the unit of measurement for usage and billing. The API also supports MCP (Microsoft Cognitive Platform) integration, allowing users to add code interpreting abilities to any MCP client. With its introduction, developers can now start using TCI today by using the Python SDK or API, and explore its benefits in lower cost, faster training, and network compression.